The routes

Or do it properly

Updated October 2026

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What it actually requires The equipment is the capital And the records are the proof A co-packer is the realistic route Your container choice still matters there Which inverts the normal order So the honest advice The co-packer conversation starts with the container References

The third route is real, and it is a capital and expertise project rather than a packaging one.

What it actually requires

A competent processing authority to establish the process. Equipment capable of delivering it, with the instrumentation part 113 specifies. Establishment registration on Form FDA 2541 within ten days of first engaging. Process filing. Trained operators.

The equipment is the capital

Part 113 addresses thermal processing systems by type, with requirements for instrumentation, venting, temperature and pressure recording and operator supervision. That is industrial equipment with industrial maintenance behind it.

And the records are the proof

Temperature and pressure records per batch, retained, demonstrating that the operating process met or exceeded the scheduled process. Without the records the process might as well not have happened.

A co-packer is the realistic route

Somebody already registered, already equipped and already working to filed processes, who will run your recipe. That is how most shelf-stable soup and broth brands exist, and it is a commercial conversation rather than a build.

Your container choice still matters there

Because the scheduled process is specific to the container. A co-packer will tell you which containers they have filed processes for, and that list is usually shorter than a catalog.

Which inverts the normal order

Everywhere else in this library you choose a container and then satisfy the rules. Here the filed process chooses the container, and shopping a shelf first is the wrong sequence.

So the honest advice

If shelf stable is the requirement, find the co-packer before the jar. They will narrow the container question to a handful of options and the shelf here is 18 jars, so the overlap may be small.

The co-packer conversation starts with the container

Ask which containers they hold filed processes for before discussing recipes, because that answer constrains the product more than anything you will decide. It is a short list and it is the real specification.

References

21 CFR part 113 generally, which sets the equipment and procedural requirements for thermal processing systems, including instrumentation, venting, temperature and pressure records and operator supervision for each type of retort. law.cornell.edu

21 CFR 108.35, Thermal processing of low-acid foods packaged in hermetically sealed containers. Paragraph (a) records that the harmful nature of such foods cannot be adequately determined after they have entered interstate commerce; (c)(1) requires a commercial processor to register with FDA on Form FDA 2541 not later than 10 days after first engaging in such processing, giving the establishment locations, the processing method in terms of equipment employed, and a list of the low-acid foods processed. law.cornell.edu

21 CFR 113.3, the definitions for thermally processed low-acid foods packaged in hermetically sealed containers. Paragraph (j) defines a hermetically sealed container as one designed and intended to be secure against the entry of microorganisms so as to maintain commercial sterility; (n) defines low-acid foods as those with a finished equilibrium pH greater than 4.6 and a water activity greater than 0.85, excluding tomatoes and tomato products below pH 4.7; (r) requires a scheduled process at least equivalent to one established by a competent processing authority. law.cornell.edu

Written from federal regulation, not from a production kitchen. Nothing here is a scheduled process, and nothing here is a substitute for a competent processing authority. If you are considering a shelf-stable low-acid product, the first call is to a process authority rather than to a packaging supplier.